Pneumatic chuck.



PATENTED AUG. 11, 1908.

0. B. DBLANY.. PNEUMATIC CHUCK. APPLICATION FILED MAR. 18, 1908.

facility an umrnfisinfins PATIENT OFFICE.

CHARLES B. DELANY, 0F coLUMBiIs, on o.

PNEUMATIC c nrocx.

Specification of Letters Batent.

Application filed. March 16, 1908. Serial No. 421,460. I

' To all'whom at my concern:

Be it known that I, CnARLEs B. DELANY, a citizen of the United States, residing at C0- lumbus, in the county of Franklin and State of Ohio, haveinvented a certain new and useful Improvement in Pneumatic Chucks, of which thefollowin is a specificstion.

The object of this invention is to make immovements in chucks for lathes whereby they are operated and adjusted with greater used with erect-er convenience.

The invention is embodied in the features of construction hereinafter described and pointed out in the eppendedclsims.-'

In the accompanying drawings illustrating one instance or the invention-Figure 1 is mainly a central lon itudinal sectional view with some arts left in full; Fig.2 is a; detail of the chuc jaws and contiguous parts; Fig. 3 is an end view looking to toe right Fig. 2.

- .In the views 4 designates the heed stock in which turns the tubular mandrel 5. At its left-hand end the tubulsr mandrel is externally threaded to receive the inner portion of the chuck socket 6 and said portion 6 is internall thresded to receive the outer portion 0 the chuck socket 7. The outer por tion 7 isinternelly inwsrdlv tspered'et its outer end to contract the chuck jaws when they are thrust outward in the chuck socket.

8 des' ates chuck-bearing levers to which work-ho-din jaw blocks 9' are secured by screws 10. bilierent sizes of jaw blocks can therefore be used. The levers S are pivoted, as seen at 11, on ears 12 of a shank 13. The left-hand or outer end of the shank 13 is 'socketed and is furnished with a sliding head 14 with rounded edges, said head be' backed b a spring 15 that presses the hdiid against t 'e jaw levers and tends to spread said lever and the jaw block asunder. head 14 is held slidingl in place b means of small screws 14 whic work in s ots 13 in the shank 13. The right-hand or inner end of -the shank 13 is made with a threaded socket 13*. l

The right-bend end of the tubuler mandrel 5 has bolted to it a pneumatic or fluidpressure cylinder 116 containing a piston 17 aving a. rod 18 that extends into the tubulsr mandrel 5. The left-hand end of the rod 18 is threaded to be udjustabl engaged by The piston takes pressure at its rig it-hand side through-a pipe 19 swiveled in a suitable manner, or as shown, to the cylinder. At its left-hand side .the piston is pressed by sprin s 20. Fluid ressure on the iston t us olds the chuc jaws on the wor c and the springs 20 in conjunction with the springpressed head 14 release the chuck jaws from the work whenthe fluid pressure on the piston is exhausted. Any suitable form of valve, not shown, for admitting pressure to and exhausting it from the said cylinder can be provided. It will thus be observed, first, that fluid pressure is used in holding the work only; second, that s rings not only move the jaws longitudinally in th'esocket but also spread and hold them asunder ready for the'insertion of work, and third, that the extent of movement of the jaws with refer ence to the socket can be nicely regulated.

What I clhim and desire to secure-by Letters Patent is:

jswlevers in said socket, a longitud nally Patented Aug. 1'1, 19.08.

movable shank to which said jaw lovers are pi oted, and means between said shank and the jaw levers tending to spread the jaws asunder. I t

2. In a chuck, the combination of. the chuck socket having a j sw-contracting end, jaw levers in said socket, a longitudinally movable shank to which said jaw levers are pivoted, and a spring-pressed head between said shank end the jaw levers;

CHARLES vB. DELANY. Witnesses: j JAMES STRADERYI Bum. FINOKEL. 

